A malloon is a hot,sexy,fun girl. She is usally amazing to be with and will always make you laugh. You can go to a malloon for anything. A malloon will always make u feel happy when your sad. She is one and a kind.

Girl: WHY IS EVERY BOY TALKING ABOUT A MALLOON?!
Boy: dude, you dont know what a malloon is? Malloon is hot as hell.